Which statement accurately describes the relationship between elements and reactivity? A. Elements whose atoms have a filled outer energy level are the most reactive.
B. The most reactive elements are those whose atoms hold tightly onto all of their
electrons.
C. The most reactive elements are those whose atoms can easily lose or gain valence
electrons because they have unfilled valence shells.
D. The most reactive elements are those whose atoms have no valance shell.

i'd say that the moon rock is about 2.2 billion years old.

answer: decrease

a limiting factor is the one which decrease the abundance, distribution and causes extinction of the population of species in a ecosystem. here, predators including hawks, owls and snakes are the limiting factor for the population of mexican free tailed bat.   although bats are nocturnal animals as they forge for food at night these predators also may remain active during night which can decrease the population of the mexican free-tailed bats. also, these bats eat only one type of insects that are moths. the food can also be a limiting factor as all 400 members are dependent upon same type of food needs that are moths. the decrease in the moth population can cause decrease in population size of the mexican free-tailed bats.

therefore, the scenarios will most likely to decrease the population size of the mexican free-tailed bats.